Abstract
Aiming at the problem of pipeline vibration caused by fluids in linear-driving pump pipeline system, this paper proposed a vibration reduction method based on a pressure-fluctuating attenuator with circular elastic sheets. Firstly, a new type of pressure-fluctuating attenuator was proposed, and its working principle and frequency characteristics were analyzed. Secondly, the mathematical model of the developed attenuator was established in combination with the dynamic characteristic equations of the pipeline. Besides, the effect of relevant parameters on attenuation performance was investigated through simulation. The size and material of the circular elastic sheet were screened according to the pressure fluctuating frequency of the linear-driving pump under the rated conditions. The prototype of the pressure-fluctuating attenuator was fabricated, and the performance of the prototype in the pipeline was tested. The experimental results show that the pressure-fluctuating attenuator with circular elastic sheets has a good suppression effect on the pulsating pressure of the linear-driving pump under the rated conditions.
Highlights
Water hydraulic piston pump is widely used in lots of industrial fields because it has many advantages such as cleanliness, safety, high volume efficiency, and high power density
As a new type of bilge drainage pump, a water hydraulic piston pump driven by linear motors breathes and removes water through the reciprocating motion of pistons
Shock vibration is inevitable too because of the high-frequency opening and closing of the flow valves [1, 2]. ese vibrations will be transmitted to the body of the device through pipeline [3, 4], which will decrease the concealment performance of the device and have influence on the health and living environment of the staff. erefore, the vibration characteristics and research of vibration reduction on the pipeline of the linear-driving pump are significant to enhance the reliability of the pipeline
Summary
Water hydraulic piston pump is widely used in lots of industrial fields because it has many advantages such as cleanliness, safety, high volume efficiency, and high power density. Zhang [17] established H-type and multihole concentric pulsation attenuator models based on the frequency method and finite element simulation, respectively, and analyzed the influence of structural parameters on the performance of the pulsation attenuator. He et al [18] designed a pulsation attenuator based on the principle of cochlear basement membrane simulation, analyzed the influence of structural parameters on the performance of the attenuator, and verified its broadspectrum filtering characteristics through experiments. By analyzing the vibration frequency characteristics of the linear motor pump under different load conditions, the pressure-fluctuating attenuator is developed. The effectiveness of the attenuator is verified by experiments, and a control method is proposed for the low-frequency pulse amplitude generated under low-pressure load conditions
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